{"id":2934,"date":"2026-05-27T14:11:40","date_gmt":"2026-05-27T14:11:40","guid":{"rendered":"https:\/\/materialparts.com\/lm2664m6-nopb\/"},"modified":"2026-05-27T14:11:40","modified_gmt":"2026-05-27T14:11:40","slug":"lm2664m6-nopb","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/lm2664m6-nopb\/","title":{"rendered":"LM2664M6\/NOPB"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The LM2664M6\/NOPB from Texas Instruments is a CMOS switched-capacitor voltage inverter in a SOT-23-6 package. It converts a 1.8V to 5.5V positive input to the corresponding negative output (-1.8V to -5.5V) at up to 40mA, with 91% typical conversion efficiency, 12\u03a9 output impedance, 160kHz oscillator, and 1\u03bcA shutdown current for battery-powered negative rail generation.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u8f93\u5165\u7535\u538b\u8303\u56f4<\/td>\n1.8V to 5.5V<\/td>\n<\/tr>\n
Output Voltage<\/td>\n-VIN (inverted, ratiometric)<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\nUp to 40mA<\/td>\n<\/tr>\n
Output Impedance<\/td>\n12\u03a9 typ.<\/td>\n<\/tr>\n
Conversion Efficiency<\/td>\n91% typ. at 40mA<\/td>\n<\/tr>\n
Oscillator Frequency<\/td>\n160kHz (switching at 80kHz)<\/td>\n<\/tr>\n
Operating Supply Current<\/td>\n220\u03bcA typ.<\/td>\n<\/tr>\n
\u5173\u673a\u7535\u6d41<\/td>\n1\u03bcA typ.<\/td>\n<\/tr>\n
Output Resistance (switching)<\/td>\n12\u03a9 typ.<\/td>\n<\/tr>\n
Output Voltage Ripple<\/td>\nTyp. 30mVpp at 5V, 40mA<\/td>\n<\/tr>\n
External Components<\/td>\n2 capacitors (CIN, CPUMP)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOT-23-6 (2.9 x 1.6mm)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +85\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Inverts input supply voltage (positive to negative)<\/li>\n
  • 1.8V to 5.5V input range<\/li>\n
  • Up to 40mA output current<\/li>\n

91% typical conversion efficiency at 40mA<\/td>\n<\/tr>\n
  • 12\u03a9 typical output impedance<\/li>\n
  • 160kHz oscillator frequency (80kHz switching)<\/li>\n
  • 1\u03bcA typical shutdown current<\/li>\n
  • 220\u03bcA typical operating current<\/li>\n
  • Only 2 external capacitors required<\/li>\n
  • 6-pin SOT-23 package for compact designs<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Negative rail generation for op-amps from single supply<\/li>\n
    • Cell phone and PDA LCD bias supply<\/li>\n
    • Portable instrument negative voltage reference<\/li>\n
    • Interface power supply inversion<\/li>\n
    • GAAS FET bias generation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM2664M6\/NOPB from Texas Instruments is a CMOS switched-capacitor voltage inverter in a SOT-23-6 package. It converts a 1.8V to 5.5V positive input to the corresponding negative output (-1.8V to -5.5V) at up to 40mA, with 91% typical conversion efficiency, 12\u03a9 output impedance, 160kHz oscillator, and 1\u03bcA shutdown current for battery-powered negative rail […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[31,13],"tags":[],"chip_brand":[138],"class_list":["post-2934","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Charge pump voltage inverter, 1.8-5.5V to -1.8 to -5.5V, 40mA, 91% eff, SOT-23-6","date_code":"","package_case":"SOT-23-6 \/ DBV (2.9 x 1.6 x 1.15mm)","in_stock":3679,"datasheet":"https:\/\/www.ti.com\/product\/LM2664","price":"$0.40 @ 1ku","product_introduction":"The LM2664M6\/NOPB from Texas Instruments is a CMOS charge-pump voltage converter that inverts a positive input voltage in the range of 1.8V to 5.5V to the corresponding negative voltage (-1.8V to -5.5V). Using only two low-cost external capacitors, it provides up to 40mA output current with 91% typical conversion efficiency. The 160kHz oscillator frequency reduces output resistance and voltage ripple. With 220\u03bcA operating current and 1\u03bcA shutdown current, the device is optimized for battery-powered systems requiring a negative rail from a single positive supply.","working_principle":"The LM2664 uses a switched-capacitor charge-pump circuit with two phases. During Phase 1 (charge), the internal flying capacitor (CP) is connected between VIN and GND, charging it to the input voltage. During Phase 2 (transfer), the flying capacitor is reconnected with its positive terminal to GND and its negative terminal to the output, transferring the stored charge to the output capacitor (CO) and generating a negative voltage at the OUT pin. The internal MOSFET switches alternate between these two phases at 80kHz (160kHz oscillator, divide-by-2), creating an inverted output voltage approximately equal to -VIN. The 12\u03a9 output impedance results from the combined on-resistance of the internal switches and the ESR of the external capacitors. The SD pin disables the oscillator and reduces current to 1\u03bcA in shutdown mode.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>GND<\/td>Power<\/td>Ground reference<\/td><\/tr>
      2<\/td>OUT<\/td>Power<\/td>Negative voltage output<\/td><\/tr>
      3<\/td>CAP-<\/td>Analog<\/td>Flying capacitor negative terminal<\/td><\/tr>
      4<\/td>SD<\/td>Input<\/td>Shutdown control (high=on, low=shutdown)<\/td><\/tr>
      5<\/td>V+<\/td>Power<\/td>Positive input supply (1.8V to 5.5V)<\/td><\/tr>
      6<\/td>CAP+<\/td>Analog<\/td>Flying capacitor positive terminal<\/td><\/tr><\/table>","application_scenarios":"
      • Negative rail generation for dual-supply op-amps from single battery<\/li>
      • Cell phone LCD bias voltage inverter<\/li>
      • Portable instrument negative reference for ADC\/DAC<\/li>
      • GAAS FET gate bias from single positive supply<\/li>
      • RS-232 negative supply generation from 3.3V or 5V<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>LM2664M6X\/NOPB<\/td>SOT-23-6<\/td>Tape and reel version<\/td><\/tr>
        TI<\/td>LM27761DSGR<\/td>WSON-8<\/td>Low-noise inverting charge pump + LDO<\/td><\/tr>
        ADI<\/td>ADM660ARZ<\/td>SOIC-8<\/td>50mA, 1.5-7V inverting charge pump<\/td><\/tr>
        onsemi<\/td>NCP883SN185T1G<\/td>TSOP-5<\/td>5V to -5V inverting charge pump<\/td><\/tr>
        Microchip<\/td>TC1121EOA713<\/td>SOIC-8<\/td>80mA inverting charge pump<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2934","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=2934"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2934\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2934"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2934"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2934"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2934"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}